make ProxyService::CreateSystemProxyConfigService return scoped_ptrs NOT FOR REVIEW

chrome/browser/io_thread.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/io_thread.h"
 
 #include <vector>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 1200 matching lines @@
 void IOThread::InitSystemRequestContextOnIOThread() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(!globals_->system_proxy_service.get());
   DCHECK(system_proxy_config_service_.get());
 
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   globals_->system_proxy_service = ProxyServiceFactory::CreateProxyService(
       net_log_, globals_->proxy_script_fetcher_context.get(),
       globals_->system_network_delegate.get(),
-      system_proxy_config_service_.release(), command_line,
+      system_proxy_config_service_.Pass(), command_line,
       quick_check_enabled_.GetValue());
 
   net::HttpNetworkSession::Params system_params;
   InitializeNetworkSessionParams(&system_params);
   system_params.net_log = net_log_;
   system_params.proxy_service = globals_->system_proxy_service.get();
 
   globals_->system_http_transaction_factory.reset(
       new net::HttpNetworkLayer(
           new net::HttpNetworkSession(system_params)));
@@ skipping 361 matching lines @@
   net::QuicVersionVector supported_versions = net::QuicSupportedVersions();
   for (size_t i = 0; i < supported_versions.size(); ++i) {
     net::QuicVersion version = supported_versions[i];
     if (net::QuicVersionToString(version) == quic_version) {
       return version;
     }
   }
 
   return net::QUIC_VERSION_UNSUPPORTED;
 }